Device and method for remotely controlling folding and unfolding of flap in rear cabin

Abstract

The invention relates to the technical field of aviation, in particular to a device and method for remotely controlling a flap to retract and release in a rear cabin. The flap teaching and training efficiency and effect are improved. Structurally, pneumatic electromagnetic valves are additionally arranged on corresponding pipelines for air supply, retraction and release of a rear cabin flap switch; the controller is composed of a voltage supply power source, a valve control assembly, a control program and the like and is in electric signal connection with each electromagnetic valve. The invention provides a device and a method for remotely controlling a flap folding and unfolding function of a rear cabin when a rear cabin flap switch handle is in a neutral state. The original control function of the front cabin flap and the rear cabin flap is reserved, the control function of the rear cabin flap in the machine can be achieved through ground remote control, and the teaching and training efficiency and effect are improved.

Description

Technical Field

[0001] The present invention relates to the field of aviation technology, and is a device and method for realizing the rear cabin ground remote control flap retraction and extension function by using a pneumatic solenoid valve, a controller, and front and rear cabin flap retraction and extension switches. Specifically, it relates to a device and method for rear cabin remote control flap retraction and extension. Background Art

[0002] In the existing flap retraction and extension cooling system of a certain type of aircraft, the flap retraction and extension function is realized by the front and rear cabin flap retraction and extension switches. During teaching and training, the front and rear cabins are operated by students and instructors respectively. When the flap switch handle of the rear cabin is in the neutral position, the students in the front cabin can operate the flap retraction and extension through the front cabin flap switch; when the flap switch handle of the rear cabin is in the retracted position, the flap switch handle of the front cabin is placed in the lowered position, and the flap is slowly lowered; when the flap switch handle of the rear cabin is in the lowered position, the flap switch handle of the front cabin is placed in the retracted position, and the flap does not move. During each teaching and training, the instructor needs to frequently go on the plane to operate and get off the plane to explain. He also needs to observe the students' operation and flap movement, and make judgments on the learning situation of each student. This not only consumes a lot of time and physical strength, but also affects the teaching effect. The flap retraction and extension cooling system consists of a cooling air source, front and rear cabin flap retraction and extension switches, flap valves, flap retraction and extension actuators, etc. Summary of the invention

[0003] When conducting the aircraft landing system teaching and training system, in order to free the instructor in the rear cabin to operate, the instructor can better teach and demonstrate functions intuitively and clearly to many students on the ground. The present invention provides a device and method for remotely controlling the flap retraction and extension function of the rear cabin when the rear cabin flap switch handle is in a neutral state. The invention not only retains the original control function of the front and rear cabin flaps, but also can realize the rear cabin flap control function in the aircraft through ground remote control, thereby improving the teaching and training efficiency and effect.

[0004] Purpose of the Invention

[0005] In order to improve the efficiency and effect of flap teaching and training, the invention structurally installs pneumatic solenoid valves on the corresponding pipelines of the rear cabin flap switch air supply, retraction and release; the controller is composed of a pressure supply power supply, valve control components, control program, etc., and is connected to each solenoid valve for electrical signals.

[0006] Technical Solution

[0007] A device for remotely controlling the retraction and extension of flaps in a rear cabin, wherein a cold air source is connected to the air inlet of a front cabin flap switch, the air supply inlet of a rear cabin flap lowering solenoid valve, the air inlet of a rear cabin flap switch, and the air supply inlet of a rear cabin flap retracting solenoid valve. The "release" interface and the "retract" interface of the front cabin flap switch are respectively connected to the lower end of a flap release valve and the lower end of a flap retracting valve. The air outlet of the rear cabin flap lowering solenoid valve is connected to the nut end of the flap release valve, the "release" interface of the rear cabin flap switch, and the air supply inlet of an actuator lowering chamber air release solenoid valve, and the rear cabin flap lowering solenoid valve is electrically connected to a controller. The air supply inlet of the actuator lowering chamber air release solenoid valve is connected to the nut end of the flap release valve, and the actuator lowering chamber air release solenoid valve is electrically connected to the controller. The air supply inlet of the actuator retracting chamber air release solenoid valve is connected to the nut end of the flap retracting valve, and the actuator retracting chamber air release solenoid valve is electrically connected to the controller. The air outlet of the rear cabin flap retracting solenoid valve is connected to the air supply port of the actuator cylinder retracting chamber venting solenoid valve, the nut end of the flap retracting valve, and the "retracting" interface of the rear cabin flap switch, and the rear cabin flap retracting solenoid valve is electrically connected to the controller. The side nozzle of the flap release valve is connected to the "release" interface of the flap actuator, the side nozzle of the flap retracting valve is connected to the "retracting" interface of the flap actuator, and the lower end of the flap retracting valve is connected to the "retracting" interface of the front cabin flap switch.

[0008] A method for remotely controlling the retraction and extension of a rear cabin flap, when the rear cabin flap is remotely controlled on the ground, the rear cabin flap switch handle is always in a neutral state. A cold air source supplies air pressure to the air supply ports of the front cabin flap switch, the rear cabin flap lowering solenoid valve, the rear cabin flap switch, and the rear cabin flap retracting solenoid valve at the same time through the connected pipeline.

[0009] When the rear cabin flaps are lowered by remote control on the ground, the controller outputs control signals to the rear cabin flap lowering solenoid valve and the actuator upper chamber bleed solenoid valve, respectively, to connect the solenoid valve gas circuit. The air pressure passes through the rear cabin flap lowering solenoid valve and enters the flap valve from the nut end of the flap lowering valve, causing the diverter valve to move and compress the spring. The cold air enters the lowering chamber of the flap retracting actuator cylinder through the side nozzle of the flap lowering valve; at the same time, the gas in the upper chamber of the flap retracting actuator cylinder enters the flap retracting valve, the nut end of the flap retracting valve, and the upper chamber bleed solenoid valve of the actuator cylinder through the side nozzle of the flap retracting valve in turn, to discharge the gas in this pipeline.

[0010] When the rear cabin flaps are retracted by remote control on the ground, the controller outputs control signals to the rear cabin flap retraction solenoid valve and the actuator cylinder lowering chamber bleed solenoid valve, respectively, to connect the solenoid valve gas circuit. The air pressure passes through the rear cabin flap retraction solenoid valve and enters the flap valve from the flap retraction valve nut end, causing the diverter valve to move and compress the spring. The cold air enters the flap retraction and extension actuator cylinder retraction chamber through the side nozzle of the flap retraction valve; at the same time, the gas in the flap retraction actuator cylinder lowering chamber enters the flap release valve, the flap release valve nut end and the actuator cylinder lowering chamber bleed solenoid valve through the side nozzle of the flap release valve in turn, to remove the gas in this pipeline.

[0011] Furthermore, when the rear cabin flaps are retracted or extended by ground remote control, the rear cabin flap switch handle is always in a neutral position.

[0012] Furthermore, the cold air source supplies air pressure to the air supply ports of the front cabin flap switch, the rear cabin flap lowering solenoid valve, the rear cabin flap switch, and the rear cabin flap retracting solenoid valve simultaneously through the connected pipelines;

[0013] Furthermore, the rear cabin flap lowering solenoid valve, the actuator lowering chamber venting solenoid valve, the actuator upper chamber venting solenoid valve, and the rear cabin flap retracting solenoid valve are all two-position three-way one-in-one-out normally closed solenoid valves. When powered on, the valve of the solenoid valve opens, and when powered off, the valve of the solenoid valve closes, and the voltage supply is 24±10% VDC;

[0014] Furthermore, the controller may be a portable controller that is easy to carry, or may be a functional module embedded in the test bench measurement and control system;

[0015] Furthermore, the controller shall have electrical manual automatic control and software manual automatic control functions, the voltage control range shall be adjustable within the range of 0 to 30 VDC, and the control channels shall be no less than 4;

[0016] Furthermore, the rear cabin flap lowering solenoid valve, the actuator lowering chamber deflation solenoid valve, the actuator retracting chamber deflation solenoid valve, and the rear cabin flap retracting solenoid valve are solenoid valves whose working medium is air, and the air pressure range is within 6MPa;

[0017] The beneficial effects of this application are:

[0018] The present invention provides a method for realizing a ground remote control rear cabin flap operation function by installing a pneumatic solenoid valve and configuring a controller on the corresponding pipelines for air supply, retraction and extension of the rear cabin flap switch when the rear cabin flap switch handle is in a neutral state.

[0019] Compared with the existing device, this device is simple and convenient to install the solenoid valve on the pipeline. The installed solenoid valve takes up little space and has little impact on the internal space of the test bench. The configured controller is independent of the test bench and will not affect the spatial layout of the test bench. The combination of the solenoid valve and the controller realizes the ground remote control of the rear cabin flap control function.

[0020] This method uses the remote manual automatic control of the electromagnetic valve on the ground to open and close, solving the problem of frequent switching of multiple scenes and multiple working conditions during teaching and training, where the instructor goes on board to operate, explains on board, observes the student's operation and flap movement, and makes judgments on each student's learning situation. It saves the instructor's operation time and physical strength, and gives the instructor more time to explain to the students on site. At the same time, the instructor can grasp the actual operation of the students on site more intuitively and clearly, achieving the purpose of improving the efficiency and effect of teaching and training.

[0021] The present invention has the advantage of redundant control. When executing the ground remote control rear cabin flap control function, the original control mode of the front and rear cabins of the test bench is retained. When one mode fails, it can be immediately switched to another mode for retraction and extension, avoiding the interruption of teaching and training and ensuring the continuation of training.

[0022] This technical solution is applicable to the ground remote control of the rear cabin flap operation of the test bench of the same type. It can also be extended to other types of test benches by properly adjusting and configuring the position, number and controller channels of the solenoid valves on the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 See Figure for the system schematic.

[0024] In the figure, 1. cold air source, 2. front cabin flap switch, 3. rear cabin flap lowering solenoid valve, 4. actuator lowering chamber bleed solenoid valve, 5. controller, 6. actuator retracting chamber bleed solenoid valve, 7. rear cabin flap retracting solenoid valve, 8. rear cabin flap switch, 9. flap lowering valve, 10. flap retracting valve, 11. flap actuator. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0026] In order to improve the efficiency and effect of flap teaching and training. The invention structurally installs pneumatic solenoid valves on the corresponding pipelines of the rear cabin flap switch air supply, retraction and release; the controller is composed of a pressure supply power supply, valve control components, control program, etc., and is connected to each solenoid valve for electrical signals. Figure 1 .

[0027] A device for remotely controlling the retraction and extension of a rear cabin flap, wherein a cold air source 1 is connected to an air inlet of a front cabin flap switch 2, an air supply inlet of a rear cabin flap lowering solenoid valve 3, an air inlet of a rear cabin flap switch 8, and an air supply inlet of a rear cabin flap retracting solenoid valve 7. The "release" interface and the "retract" interface of the front cabin flap switch 2 are respectively connected to the lower end of a flap release valve 9 and the lower end of a flap retracting valve 10. The air outlet of the rear cabin flap lowering solenoid valve 3 is connected to the nut end of the flap release valve 9, the "release" interface of the rear cabin flap switch 8, and the air supply inlet of an actuator lowering chamber air release solenoid valve 4, and the rear cabin flap lowering solenoid valve 3 is electrically connected to a controller 5. The air supply inlet of the actuator lowering chamber air release solenoid valve 4 is connected to the nut end of the flap release valve 9, and the actuator lowering chamber air release solenoid valve 4 is electrically connected to the controller 5. The air supply inlet of the upper chamber deflation electromagnetic valve 6 of the actuator is connected to the nut end of the flap retracting valve 10, and the upper chamber deflation electromagnetic valve 6 of the actuator is electrically connected to the controller 5. The air outlet of the rear cabin flap retracting electromagnetic valve 7 is connected to the air supply inlet of the upper chamber deflation electromagnetic valve 6 of the actuator, the nut end of the flap retracting valve 10, and the "retract" interface of the rear cabin flap switch 8, and the rear cabin flap retracting electromagnetic valve 7 is electrically connected to the controller 5. The side pipe nozzle of the flap release valve 9 is connected to the "release" interface of the flap actuator 11, the side pipe nozzle of the flap retracting valve 10 is connected to the "retract" interface of the flap actuator 11, and the lower end of the flap retracting valve 10 is connected to the "retract" interface of the front cabin flap switch 2.

[0028] A method for remotely controlling the retraction and extension of a rear cabin flap. When the rear cabin flap is remotely controlled on the ground, the handle of the rear cabin flap switch (8) is always in a neutral state. A cold air source (1) supplies air pressure to the air supply ports of the front cabin flap switch (2), the rear cabin flap lowering solenoid valve (3), the rear cabin flap switch (8), and the rear cabin flap retracting solenoid valve (7) through connected pipelines.

[0029] When the rear cabin flap is lowered by remote control on the ground, the controller (5) outputs control signals to the rear cabin flap lowering solenoid valve (3) and the actuator upper chamber air release solenoid valve (6) respectively, and connects the solenoid valve gas circuit. The air pressure passes through the rear cabin flap lowering solenoid valve (3) and enters the flap valve from the nut end of the flap lowering valve (9), causing the diverter valve to move and compressing the spring. The cold air enters the lowering chamber of the flap retracting actuator (11) through the side nozzle of the flap lowering valve (9); at the same time, the gas in the upper chamber of the flap retracting actuator (11) passes through the side nozzle of the flap retracting valve (10) and enters the flap retracting valve 10, the nut end of the flap retracting valve 10 and the air release solenoid valve (6) of the actuator upper chamber in turn, and discharges the gas in the pipeline.

[0030] When the rear cabin flap is retracted by remote control on the ground, the controller (5) outputs control signals to the rear cabin flap retraction solenoid valve (7) and the actuator cylinder lowering chamber venting solenoid valve (4) respectively, and connects the solenoid valve gas circuit. The air pressure passes through the rear cabin flap retraction solenoid valve (7) and enters the flap valve 10 from the nut end of the flap retraction valve (10), causing the diverter valve to move and compress the spring. The cold air enters the retraction chamber of the flap retraction actuator cylinder (11) through the side nozzle of the flap retraction valve (10); at the same time, the gas in the lowering chamber of the flap retraction actuator cylinder (11) enters the flap release valve (9) and the nut end of the flap release valve (9) in turn through the side nozzle of the flap release valve (9) and enters the actuator cylinder lowering chamber venting solenoid valve (4), thereby removing the gas in the pipeline.

[0031] In a certain implementation case of the present invention, when the rear cabin flaps are retracted and extended by ground remote control, the handle of the rear cabin flap switch (8) is always in a neutral state.

[0032] In a certain embodiment of the present invention, the cold air source (1) supplies air pressure to the air supply ports of the front cabin flap switch (2), the rear cabin flap lowering solenoid valve (3), the rear cabin flap switch (8), and the rear cabin flap retracting solenoid valve (7) simultaneously through the connected pipelines;

[0033] In a certain implementation case of the present invention, the rear cabin flap lowering solenoid valve 3, the actuator lowering chamber air release solenoid valve 4, the actuator upper chamber air release solenoid valve 6, and the rear cabin flap upper solenoid valve 7 are all two-position three-way one-input one-output normally closed solenoid valves, the valve of the solenoid valve is opened after power is turned on, and the valve of the solenoid valve is closed after power is turned off, and the voltage supply pressure is (24±10%) VDC;

[0034] In a certain implementation case of the present invention, the controller (5) may be a portable controller that is easy to carry, or may be a functional module embedded in a test bench measurement and control system;

[0035] In a certain embodiment of the present invention, the controller (5) should have the functions of electrical manual automatic control and software manual automatic control, the voltage control range is adjustable within the range of 0 to 30 VDC, the control channels are not less than 4, and the control progress is better than 0.5%;

[0036] In a certain embodiment of the present invention, the rear cabin flap lowering solenoid valve (3), the actuator lowering chamber air release solenoid valve (4), the actuator retracting chamber air release solenoid valve (6), and the rear cabin flap retracting solenoid valve (7) are solenoid valves whose working medium is air, and the air pressure range is within 6MPa;

[0037] In a certain implementation case of the present invention, the invention retains the original flap retraction and extension control method of the test bench while realizing the ground remote control of the rear cabin flap retraction and extension function, and has the advantage of redundancy. When one control method fails, it can be easily and quickly switched to another control method.

[0038] The method provides the air pressure required for flap retraction and extension through a cold air source; when the rear cabin flap switch handle is kept in a neutral position, a signal is sent through the controller to control the on and off of the air circuit solenoid valve, so that the gas in the cold air source passes through the rear cabin flap lowering solenoid valve (rear cabin flap retraction solenoid valve) and the flap valve nut end in turn into the flap valve, so that the diverter valve moves and compresses the spring, and the cold air enters the flap retraction and extension actuator cylinder through the side pipe nozzle of the flap valve; at the same time, the gas in another chamber of the flap retraction and extension actuator cylinder enters the flap valve, the flap valve nut end and the air release solenoid valve through the side pipe nozzle corresponding to the flap valve in turn, to discharge the gas in this pipeline.

[0039] The present invention is a device and method for realizing the ground remote control of the rear compartment flap operation function, which is composed of a cold air source, a front and rear compartment flap retraction and extension switch, a pneumatic solenoid valve, a controller, a flap valve, a flap retraction and extension cylinder, etc. The principle diagram of the system is shown in Figure 1 .

[0040] When the rear cabin flaps are retracted and extended by ground remote control, the handle of the rear cabin flap switch (8) is always in a neutral state. The cold air source (1) supplies air pressure to the front cabin flap switch (2), the rear cabin flap lowering solenoid valve (3), the rear cabin flap switch (8), and the air supply port of the rear cabin flap retracting solenoid valve (7) through the connected pipelines.

[0041] When the rear cabin flap is lowered by remote control on the ground, the controller (5) outputs a 24VDC control signal to the rear cabin flap lowering solenoid valve (3) and the actuator upper chamber venting solenoid valve (6), and the two normally closed solenoid valves are energized, the valves of the solenoid valves are opened, and the gas path of the pipeline where the solenoid valves are located is connected. The air pressure passes through the rear cabin flap lowering solenoid valve (3) and enters the flap valve from the nut end of the flap lowering valve (9), causing the diverter valve to move and compress the spring, and the cold air enters the lowering chamber of the flap retracting actuator (11) through the side nozzle of the flap lowering valve (9); at the same time, the gas in the upper chamber of the flap retracting actuator (11) enters the flap retracting valve 10 and the nut end of the flap retracting valve 10 through the side nozzle of the flap retracting valve (10) and enters the actuator upper chamber venting solenoid valve (6) in turn, and the gas in the pipeline is discharged.

[0042] When the rear cabin flap is retracted by remote control on the ground, the controller (5) outputs a 24VDC control signal to the rear cabin flap retraction solenoid valve (7) and the actuator lowering chamber bleed solenoid valve (4), respectively, and the two normally closed solenoid valves are energized, the valves of the solenoid valves are opened, and the gas path of the pipeline where the solenoid valves are located is connected. The air pressure passes through the rear cabin flap retraction solenoid valve (7) and enters the flap valve 10 from the nut end of the flap retraction valve (10), causing the diverter valve to move and compress the spring, and the cold air enters the retraction chamber of the flap retraction actuator (11) through the side nozzle of the flap retraction valve (10); at the same time, the gas in the lowering chamber of the flap retraction actuator (11) enters the flap release valve (9) and the nut end of the flap release valve 9 in turn through the side nozzle of the flap release valve (9) and enters the actuator lowering chamber bleed solenoid valve (4), thereby removing the gas in the pipeline.

[0043] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A device for remotely controlling the retraction and extension of flaps in a rear cabin, characterized in that: The cold air source is connected to the air inlet of the front cabin flap switch, the air supply inlet of the rear cabin flap lowering solenoid valve, the air inlet of the rear cabin flap switch, and the air supply inlet of the rear cabin flap retracting solenoid valve; the "release" interface and "retract" interface of the front cabin flap switch are respectively connected to the lower end of the flap release valve and the lower end of the flap retracting valve; the air outlet of the rear cabin flap lowering solenoid valve is connected to the nut end of the flap release valve, the "release" interface of the rear cabin flap switch, and the air supply inlet of the actuator cylinder lowering chamber air release solenoid valve, and the rear cabin flap lowering solenoid valve is electrically connected to the controller; the air supply inlet of the actuator cylinder lowering chamber air release solenoid valve is connected to the nut end of the flap release valve, and the actuator cylinder lowering chamber air release The solenoid valve is electrically connected to the controller; the air supply inlet of the actuator cylinder retracting upper chamber air release solenoid valve is connected to the nut end of the flap retracting valve, and the actuator cylinder retracting upper chamber air release solenoid valve is electrically connected to the controller; the air outlet of the rear cabin flap retracting solenoid valve is connected to the air supply port of the actuator cylinder retracting upper chamber air release solenoid valve, the nut end of the flap retracting valve, and the "retract" interface of the rear cabin flap switch, and the rear cabin flap retracting solenoid valve is electrically connected to the controller; the side pipe nozzle of the flap release valve is connected to the "release" interface of the flap actuator, the side pipe nozzle of the flap retracting valve is connected to the "retract" interface of the flap actuator, and the lower end of the flap retracting valve is connected to the "retract" interface of the front cabin flap switch.

2. The method for remotely controlling the retraction and extension of the rear cabin flaps of the device according to claim 1, characterized in that: When the rear cabin flaps are retracted and extended by ground remote control, the rear cabin flap switch handle is always in a neutral state; the cold air source supplies air pressure to the front cabin flap switch, the rear cabin flap lowering solenoid valve, the rear cabin flap switch, and the air supply port of the rear cabin flap retracting solenoid valve through the connected pipelines; When the rear cabin flaps are lowered by remote control on the ground, the controller outputs control signals to the rear cabin flap lowering solenoid valve and the actuator upper chamber air release solenoid valve respectively, and the solenoid valve gas circuit is connected; the air pressure passes through the rear cabin flap lowering solenoid valve and enters the flap valve from the nut end of the flap lowering valve, causing the diverter valve to move and compress the spring, and the cold air enters the lowering chamber of the flap retracting and extending actuator through the side nozzle of the flap lowering valve; at the same time, the gas in the upper chamber of the flap retracting and extending actuator enters the flap retracting valve, the nut end of the flap retracting valve, and the air release solenoid valve of the upper chamber of the actuator through the side nozzle of the flap retracting valve in turn, and discharges the gas in this pipeline; When the rear cabin flaps are retracted by remote control on the ground, the controller outputs control signals to the rear cabin flap retraction solenoid valve and the actuator lowering chamber bleed solenoid valve respectively, and the solenoid valve air circuit is connected; the air pressure passes through the rear cabin flap retraction solenoid valve and enters the flap valve from the nut end of the flap retraction valve to move the diverter valve and compress the spring, and the cold air enters the retraction chamber of the flap retraction actuator through the side nozzle of the flap retraction valve; at the same time, the gas in the lowering chamber of the flap retraction actuator enters the flap release valve, the nut end of the flap release valve and the actuator lowering chamber bleed solenoid valve through the side nozzle of the flap release valve in turn, to remove the gas in this pipeline.

3. The method according to claim 2, characterized in that When the rear cabin flaps are retracted or extended by ground remote control, the rear cabin flap switch handle is always in the neutral position.

4. The method according to claim 3, characterized in that The cold air source supplies air pressure to the air supply ports of the front cabin flap switch, the rear cabin flap lowering solenoid valve, the rear cabin flap switch, and the rear cabin flap retracting solenoid valve simultaneously through the connected pipelines.

5. The method according to claim 4, characterized in that The rear cabin flap lowering solenoid valve, the actuator lowering chamber air release solenoid valve, the actuator retracting chamber air release solenoid valve, and the rear cabin flap retracting solenoid valve are all two-position three-way one-inlet-one-out normally closed solenoid valves. When power is turned on, the valve of the solenoid valve opens, and when power is turned off, the valve of the solenoid valve closes, and the voltage supply is 24±10% VDC.

6. The method according to claim 5, characterized in that The controller can be a portable controller that is easy to carry, or it can be a functional module embedded in the test bench measurement and control system.

7. The method according to claim 6, characterized in that The controller should have electrical manual automatic control and software manual automatic control functions, the voltage control range should be adjustable within the range of 0 to 30VDC, and the control channels should be no less than 4.

8. The method according to claim 7, characterized in that The rear cabin flap lowering solenoid valve, the actuator lowering chamber air release solenoid valve, the actuator retracting chamber air release solenoid valve, and the rear cabin flap retracting solenoid valve are solenoid valves whose working medium is air, and the air pressure range is within 6MPa.

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